Scale



1'.F.PFE1FFER.

SCALE.

APPLICATION H1511 ocT. 22. 1915.

Patented Aug. 22, 1916.

@E S @gie/mao ISADORE F. PFI'WFFER, 0F ALTOONA,' YENNSYLVANIA.

SCALE.

Specification of Letters Patent.

Patented Aug. 22, 1916.

Appiicaaon inea october 22, 1915. seran No. 57,316.

To ZZ whom 'it may @gne/5ML.'

Be it known that I, IsAnoRn F. Prnirrnn, a citizen of the United States7 residing at ltoona, in the county of Blair and State of Pennsylvania, have invented certain new and useful Improvements in Scales, of which the following a specilication- This invention relates to scales and has for its object improved means for balancing scale beams, as well as nproved facilities for reading the correct Weights indicated the beam poise The primary object ot' this invention is to provide an improve(l scale beam which is easily' inaxui'tactured, and readily balanced through the cooperation of the improved balancing Yfeature and beam poise. i

A tui-ther object o'lt this invention is to provide a beam balancing feature whereby the center of gravity of the balance 'is shifted in a vertical plane and thereby eifects the balance of the scale beam.

A still further object of the invention is i 15. having a slotted opening 16 through Iwhich the scale beam 10 protrudes.

to provide the scale beam with means for keeping the beam scale in a perfectly legible condition throughout the lite of the scale, by recessing the beam and placing the beam scale `in the recess then covering the recess with some durable transparent substance or material, as glass or Celluloid.

To the above ends the present 'invention contemplates: the novel construction, combination and arrangement of parts as will be hereinafter fully pointed out, illustrated and claimed.

t will be quite readily understood that this invention is susceptible oi a Wide range ot' structural change or modification ivithout departing from the spirit or scope ot' the invention, but a preferred and practical embodiment of the invention is shown in the accompanying drawings, in Which- Figure l is a side elevational View ot the improved beam having certain sections broken out tor convenience in illustrating the beam. Fig'. 2 is an end vieu' ot the scale beam, showing thetrig arrai'igement. Fig. 3 is a front elevation o'l the beainpoise logether with a section of the l'ieani associated therewith, Fig. el: is an end elrrxation of the parts snoivn in Fig. Fig is a cross sectional rioiv of the scale beam. illustrating the method olj attaching the beam scale to the beam. Fig. (S shows plan and elevational views ol. the poise stop which is positioneil in the beam as shown in Fie, 1 et' the dra Wings. F ig. 7 shows edge and end views of the balance adjusting 'key as used to shiftthe balancing element in a vertical. plane, as well as to move the balance ball in a hor.i\ zontal plane. Fig. 8 is a sectional view of the balancing ball, the position of which is altered through the key shoivn in Fig. 7.

Similar' reference numerals refer to similar parts throughout the several figures of the drawings. i

ln carrying out this invention I vdo not contemplate any change in the usual scale mechanism aside from the scale beam and its associated parts7 hence the improvements that have been made are readily applicable to the usual. forni of .scales wherein a beam and poise are used to indicate the Weights; and to this end I provide a scale beam designated in its entirety by thel numeral 10,. having yassociated therewitha poise 11, a balancing feature 12 and a poise trig 13, together with a Zero pointer 14,

The poise 11 primarily consists of a frame In 0rder to provide for easy movement of the poise along the beam there is shovn a. plurality of pivotal bearing spools 161l which cooperate and roll upon the top 17 of the scale beam 10. The frame 15 is further provided with a pair" of pendent arms 18, each of which. is made to carry one' end of the threaded shaft Q0, upon which is positioned a rotatable Weight 21, having a suitable scale 29 placed upon the periphery thereof, the function of which Will be described later in the specification. A

In addition to the pendent arms 187 4the frame 15 is provided with a hood shaped wing being placed concentric`with the weight 2l, and having an oblong slot 24 cut therein tor the purpose of reading the scale :22. as it rotates beneath the hood y lzior the purpose of restricting or interrupting the movement of the poise 11, there is provided in each pendent leg 18, a spring actuated member having a cone-shaped point 24a, adapted to engage a series of teeth like projections Q5 cut upon the under surface 26 ot' the scale beam 10.

To facilitate ease of poise operation there is provided, in connection with one of the cone-shaped points 24?, an operating lever Q7. designed to operate in aslot 28, which is cut in the cylindrical body portion ofthe stop 30, which terminates in the point 24 fil' i suitable pin 4l,

lIl() this Weight Will necessarily f ance of the scale beam 10.

. meente crum 32 and a finger push device 3Q; A.

spring 3i which is designed to possess less tension is positioned in the opposite pendent leg 18, and holds the stop 35 such that the point 24@ has a slight pressure engagement with the teeth cut upon the beam 10. ,W hen using this poise the index finger engages the finger push device 34 and with a slight pressure downward the point 24a is disengaged when the poise can bevmoved along the beam l0, until the pointer la indicates the approximate balance, whereupon the Weight 2l is rotated slightly, thus bringing the scale 22 with the exact pounds or fractions thereof under 'the window or vslot 24, at which time the pointer 14 indicates the exact bal-y ance. v

For .the purpose of balancing the beam there is provided the balancing feature, des ignated by the numeral l2and consists primarily oit' a cylindrical casing 3(5,l1avingv contained therein a cup-shaped receptacle 37,' which is provided with a center threaded opening 38 adapted to be engaged by a screw 39, designed to be the medium of a thumb screw device vdesignated bythe numeral 40, which engages a positioned in the neclrr l2 of the cap 43 of the cylinder 36.

For the purpose of keeping shaped receptacle 37 from rotating, when the screw is rotated, a slot le is provided in the side of the cup which is engagedl by a screw e5 positioned in the cylindrical cas ing 36. Hence it can be readily seen that any rotation of the screw will cause a vertical motion of the'cup shaped receptacle 37 and since the cup is designed to be more or less illedvv'ith lead,l the raising or lowering of eztiiect the bal- For the purpose of locking the cup in any one selected position, there is .provided a perforated collar e6, which is engagedby a pin All', positioned in the cap Ai3; hence to rotate. the screw it is ,first necessary to raise the collar above the pose ample provision is made at the upper end (i8 of the screw 39.

As a further aid in balancing the beam' there is provided an adjustable cylindrical designated bythe numeral 49, and consists primarily of a Weight 50 Which is slotted out on one side 5l to receive an oblong plate 52, upon the top edge 53, of which is positioned a rack 54 which is engaged by a pinion gear rotated by means of the thumb screw device 40a and key 40. y f

llt is quite obvious that any movement of the Weight 50, along the rack 54, Will eect lever 27 is provided.

,that the beam has operated throughv the cup pin 47, and for this pur 55, adapted to be Y the'balance of the beam, or' a. slight move-A ment in the right direction Will throw the beam in balance, if the same is out of balance.

lt is obvious Without further elaboration 70.

two separate methods of balancing the' same, either of which can be effectively used, or a combination of 'the tivo can be resorted to should it be deemed necessary by the operatorh y The beam scale 55 is designed to be positioned in a recess 57 cut in the face of the beaml.. The scale 56 is preferably placed upon heavy paper and given a coat of moisture resisting material in length may not change under different degrees of temperature. The scale'is designed to be covered with a transparent substance glass or Celluloid, then sealed in posiorder that the tion. rljhis construction obviates the trouble there is provided Wing nut 60, and

Vpositioned on the face 63 of the trig. v This 'l device beam.

For the purpose of preventing the poise il' from pledging on the beam, there is provided a poise stop 64 adapted to be. posiprevents any undue Yshock on the tioned at the point 65 on the beam and engaged by 'the poise when the same is pushed back toward the fulcrum point 66.

Without further elaboration and descrip-y tion it is thought that the many advantages of the herein described invention are readily.' apparent and l/lhat ll claimand desire to be secured by Letters Patent is,

l. A scale including a scale beam,A a poise shiftable on the beam, said poise including a poise body having a pointer for reading the scale on the beam, arms depending from the body of the poise, a threaded shaft journaled in the lower ends of the armsof sai poise, a rotatable Weight on said threaded shaft and 'having means for indicating the fractional pounds registered by the pointer on the scale beam, and a handle projecting radially from said Weight forI operating the same. o

2. A. scale'including a scale beam, a poise slidable on the beam, said poise comprising a poise body, a plurality oit anti-frictional Vrollers for riding on the beam, spring pressed members for enga-ging the underside of the beam to hold the poise still, arms depending from the poise body,

topedge of the` l a threaded sh'atjurmle 1n said arms, a"

rotatable weight in said-tlgeaded shaft and having means for ndicatingraetional parte' of a pound after the poise has come to rest on the beam 3. A scale including a sle beam, a poise sl'clable on thebeam at one side of its fulbalancin device carried y the beam on the other si e of its fulcrum point, laid balancin device including a casing, a vertically a justable Weight 1n said casing, an upstanding supporting member carriedby said casing, and a horizontalliy shiftableweight mounted on said upstan ing supporting member.

4. A scale including a scale beam, a poise slidable on the beam at one side of its fulorum point, and balancing means carried by ,fthe beam on the other side of its fulcrum point, said balancing means including a casing, a weight arranged within the casing, a screw for shifting the weight longitudinally of the casing, a rack carried by the top of said casing, a Weight straddling said rack, and ,means for shifting said latter weight along the rack.

5.` A scale including a scale beam, a poise slidable on the beam at one side of its fulcrum point, and balancing means carried by the beam on the other side of its fulcrum point, said balancing means including a casing arranged in a perpendicular position, a weight holding receptacle shiftable within the easing longitudinally thereof, means carried by said casing for preventing the weight holding receptacle from rotating, a screw for shifting said receptacle, a rack carried by the upper part ofsaid casing, a horizontally shiftable weight in straddling engagement with said rack, and an operating pinion carried by said horizontally shiftable weight. ep

ln testimony whereof I affix my signature in presence of two witnesses.

ISADORE F. PFEIFFER. Witnesses:

N. E. GBE, ALEX. Wem. 

